Keith Clay

22.3k total citations · 5 hit papers
240 papers, 14.6k citations indexed

About

Keith Clay is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Cell Biology. According to data from OpenAlex, Keith Clay has authored 240 papers receiving a total of 14.6k indexed citations (citations by other indexed papers that have themselves been cited), including 163 papers in Ecology, Evolution, Behavior and Systematics, 123 papers in Plant Science and 64 papers in Cell Biology. Recurrent topics in Keith Clay's work include Plant and fungal interactions (119 papers), Plant Pathogens and Fungal Diseases (64 papers) and Mycorrhizal Fungi and Plant Interactions (49 papers). Keith Clay is often cited by papers focused on Plant and fungal interactions (119 papers), Plant Pathogens and Fungal Diseases (64 papers) and Mycorrhizal Fungi and Plant Interactions (49 papers). Keith Clay collaborates with scholars based in United States, United Kingdom and Netherlands. Keith Clay's co-authors include Alissa Packer, S. Luke Flory, Christopher L. Schardl, James D. Bever, Jennifer A. Rudgers, Jenny Holah, Gregory P. Cheplick, Susan Marks, Adrian Leuchtmann and Heather L. Reynolds and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Keith Clay

238 papers receiving 13.6k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Evolutionary Origins and Ecological Consequences of Endophyte Symbiosis with Grasses

2002 757 citations Keith Clay et al. The American Naturalist profile →
Soil pathogens and spatial patterns of seedling mortality in a temperate tree

2000 662 citations Keith Clay et al. profile →
Fungal Endophytes of Grasses: A Defensive Mutualism between Plants and Fungi

1988 630 citations Keith Clay profile →
GRASSROOTS ECOLOGY: PLANT–MICROBE–SOIL INTERACTIONS AS DRIVERS OF PLANT COMMUNITY STRUCTURE AND DYNAMICS

2003 586 citations Keith Clay et al. profile →
Fungal Endophytes of Grasses

1990 458 citations Keith Clay profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Keith Clay United States	64	8.5k	7.2k	3.5k	3.3k	2.2k	240	14.6k
Terri Schwartz United States	7	4.2k 0.5×	3.1k 0.4×	1.7k 0.5×	983 0.3×	3.5k 1.6×	7	10.4k
Peter H. Thrall Australia	59	3.3k 0.4×	5.7k 0.8×	1.2k 0.3×	1.4k 0.4×	1.4k 0.7×	176	11.1k
Rytas Vilgalys United States	77	6.4k 0.7×	17.5k 2.4×	10.8k 3.1×	963 0.3×	6.3k 2.9×	241	24.6k
Chris Duran Australia	13	3.8k 0.4×	3.8k 0.5×	1.1k 0.3×	1.2k 0.4×	6.6k 3.0×	15	15.6k
Shane Sturrock United Kingdom	8	3.8k 0.4×	3.3k 0.5×	1.1k 0.3×	1.2k 0.4×	6.6k 3.0×	10	15.3k
Peter Meintjes New Zealand	3	3.8k 0.4×	3.3k 0.4×	1.1k 0.3×	1.2k 0.4×	6.4k 2.9×	4	15.1k
Steven Stones-Havas United States	5	3.8k 0.4×	3.3k 0.4×	1.1k 0.3×	1.2k 0.4×	6.3k 2.9×	6	15.0k
Amy Wilson Canada	14	3.9k 0.5×	3.3k 0.5×	1.1k 0.3×	1.2k 0.4×	6.3k 2.9×	34	15.5k
Harry C. Evans United Kingdom	41	2.3k 0.3×	4.3k 0.6×	1.7k 0.5×	2.5k 0.8×	1.1k 0.5×	191	10.2k
Guillaume Evanno France	22	4.3k 0.5×	6.6k 0.9×	918 0.3×	3.5k 1.0×	3.8k 1.7×	44	19.5k

Countries citing papers authored by Keith Clay

Since Specialization

Citations

This map shows the geographic impact of Keith Clay's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keith Clay with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keith Clay more than expected).

Fields of papers citing papers by Keith Clay

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keith Clay. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keith Clay. The network helps show where Keith Clay may publish in the future.

Co-authorship network of co-authors of Keith Clay

This figure shows the co-authorship network connecting the top 25 collaborators of Keith Clay. A scholar is included among the top collaborators of Keith Clay based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keith Clay. Keith Clay is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Clay, Keith, et al.. (2025). Morning glory fungal endosymbiont can alter the impacts of belowground enemies on co-occurring crop species. Symbiosis. 95(2). 195–203.

Albert, Julie, et al.. (2025). Growth of beach-adapted plants in recycled glass sand compared to natural beach sand. Plant and Soil. 514(2). 1749–1766. 2 indexed citations

McCormick, Melissa, et al.. (2025). Regional Variation in Phragmites australis Reproductive Traits and Seedling Performance in North America. Wetlands. 45(1). 1 indexed citations

Medici, Emília Patrícia, et al.. (2024). Characterization of the Blood Bacterial Microbiota in Lowland Tapirs (Tapirus terrestris), a Vulnerable Species in Brazil. Microorganisms. 12(11). 2270–2270. 2 indexed citations

Clay, Keith, et al.. (2023). Phylogenetic patterns of bioactive secondary metabolites produced by fungal endosymbionts in morning glories (Ipomoeeae, Convolvulaceae). New Phytologist. 238(4). 1351–1361. 7 indexed citations

Oh, Dong‐Ha, et al.. (2021). Novel genome characteristics contribute to the invasiveness of Phragmites australis (common reed). Molecular Ecology. 31(4). 1142–1159. 21 indexed citations

Ascunce, Marina S., Keith Clay, S. Luke Flory, et al.. (2020). Large-spored Drechslera gigantea is a Bipolaris species causing disease on the invasive grass Microstegium vimineum. Mycologia. 112(5). 921–931. 9 indexed citations

Garrido, Mario, Victor China, Yoni Gavish, et al.. (2017). From endosymbionts to host communities: factors determining the reproductive success of arthropod vectors. Oecologia. 184(4). 859–871. 12 indexed citations

Christian, Natalie, Briana K. Whitaker, & Keith Clay. (2015). Microbiomes: unifying animal and plant systems through the lens of community ecology theory. Frontiers in Microbiology. 6. 869–869. 105 indexed citations

10.

Beaulieu, Wesley T., et al.. (2015). Phylogenetic and chemotypic diversity of Periglandula species in eight new morning glory hosts (Convolvulaceae). Mycologia. 107(4). 667–678. 23 indexed citations

11.

Lively, Curtis M., Keith Clay, Michael J. Wade, & Clay Fuqua. (2005). Competitive co-existence of vertically and horizontally transmitted parasites. Evolutionary ecology research. 7(8). 1183–1190. 61 indexed citations

12.

Kover, Paula X. & Keith Clay. (1998). Trade‐off between Virulence and Vertical Transmission and the Maintenance of a Virulent Plant Pathogen. The American Naturalist. 152(2). 165–175. 46 indexed citations

13.

Clay, Keith, et al.. (1994). Differential growth of Atkinsonella species on host grass calli. Mycologia. 86(5). 667–673. 4 indexed citations

14.

Clay, Keith, et al.. (1993). Balansia Pilulaeformis , an Epiphytic Species. Mycologia. 85(4). 527–534. 13 indexed citations

15.

Leuchtmann, Adrian & Keith Clay. (1993). Nonreciprocal Compatibility Between Epichloë Typhina and Four Host Grasses. Mycologia. 85(2). 157–163. 4 indexed citations

16.

Stovall, Mary E. & Keith Clay. (1991). Fungitoxic Effects of Balansia Cyperi. Mycologia. 83(3). 288–295. 22 indexed citations

17.

Clay, Keith & Adrian Leuchtmann. (1989). Infection of Woodland Grasses by Fungal Endophytes. Mycologia. 81(5). 805–811. 86 indexed citations

18.

Leuchtmann, Adrian & Keith Clay. (1989). Morphological, Cultural and Mating Studies on Atkinsonella , Including A. Texensis. Mycologia. 81(5). 692–701. 21 indexed citations

19.

Leuchtmann, Adrian & Keith Clay. (1988). Experimental Infection of Host Grasses and Sedges with Atkinsonella Hypoxylon and Balansia Cyperi (Balansiae, Clavicipitaceae). Mycologia. 80(3). 291–297. 31 indexed citations

20.

Clay, Keith & Ruth G. Shaw. (1981). An experimental demonstration of density-dependent reproduction in a natural population of Diamorpha smallii, a rare annual. Oecologia. 51(1). 1–6. 29 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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